Metal cutting tool



Dec. 12, 1939. w c 2,182,975

METAL CUTTING TO OL Original Filed Nov. 6, 1933 Q M INVENTOR. BY 71W M ATTORNEY.

Patented Dec. 12, 1939 Archibald L. Wallace, Northport, N. Y.

Original application November 6, 1933, Serial No. 696,741. Divided and this application August 10, 1937, Serial N0. 158,269

3 Claims.

This invention relates. to a metal cutting tool, being in the nature of an improvement upon the invention disclosed in Patent No. 2,007,355, and an object of the invention is to provide a simple, practical and efiicient tool by the use of which sheet metal may be readily out along lines either straight or curved as required.

A further object is to simplify and improve the construction and render it more practical both in manufacture and in use.

A more detailed object is to improve the action of the cutting jaw.

A further detailed object is to provide an improved hinge connection between the two lever members.

A further object is to provide a suitable tool for making marginal cuts.

This application is a division of my Patent No. 2,093,987, granted September 21, 1937.

Other objects and aims of the invention, more or less specific than those referred to above, will be in part obvious and in part pointed out in the course of the following description of the elements, combinations, arrangements of parts and applications of principles constituting the invention; and the scope of protection contemplated will be indicated in the appended claims.

In the accompanying drawing which illustrates the invention:

Fig. 1 is a side elevational view, illustrating atool constructed in accordance with this invention;

Fig. 2 is an end View of the structure of Fig. 1.

Referring to the drawing for describing in detail the exemplary structures disclosed therein, the reference characters L and G indicate two handle members or levers pivotally connected together so that the two handles may be manually operated by an operators hand in the'same manner as is common to the use of ordinary scissors ,or tin snips.

At its lower end the handle or lever L is formed with a rigidly connected cutter blade or jaw I having the cutting edge 3|.

At its lower end the handle or lever G is formed with a cutting edge 32 cooperating with the cutting edge 3! on the lever L to enable the jaw to perform the cutting operation when the tool is in use in substantially the same manner as more fully set forth in the mentioned patent.

In the present instance .the jaw portion l3 of the lever G is shown as being made up as a substantially integral portion of the lever G. The lever L is placed alongside the lever G and is pivotally connected thereto by means of two cross pins l4 and I5 secured in the lever G and extending across the lever L. On the opposite side of the lever L from the lever G is secured a spring 38 which is mounted upon the pins [4 and I5 and bears against the lever L so as to 5 hold the levers L and G together and also the cutting edges 3| and 32 are held in close relationship so as to effect the desired cutting or shearing as they are moved past each other.

The pins M and I5 engage respectively with the surfaces 29 and 30 in the lever L and, with the handle portions of the levers L and G separated as'shown in the drawing, the cutting edges 3! and 32 will be separated as shown in Fig. 1, so as to receive between them the metal sheet or other object to be cut. As the right hand ends of the levers L and G are forced toward each other cutting edges 3! and 32 will be forced past each other so as to shear and cut the metal sheet or other object.

The lever L is formed with surfaces 29 and 30 engaging the pins l4 and I5 respectively so as to always maintain the rear edge 28 of the jaw l in engagement with the shoulder 21 on the lever G, thereby to constitute a pivot point between the 25 lever G and the cutter blade.

The compound pivotal connection afforded at the pins Hi and I5 engaging with the surfaces 29 and 30, together with the pivotal engagement at 21, causes the blade or jaw i to retreat slightly 30 with respect to the work when the hand grip portions of the levers L and G are swung toward each other,- thereby producing a slight sliding action of the cutting edges 3! and 32 along the work while cutting through the work, thus not 35 only easing the cutting operation, but at the same time tending to draw the work in, that is toward-the operators hand, and thus overcome the natural tendency of the work to be cammed or wedged outwardly away from the operators hand, when the jaws are squeezed together.

This retreating movement is due particularly to the inclined disposition of the rear portion 20 of the wall 29, this wall surface sliding backwardly as well as downwardly past the cross pin I4 when the handle L is swung down toward the handle G. This permits the jaw I to move upwardly to some extent with relation to the pin l5 as it turns about its pivot on the edge of the shoulder 29.

The cross pins I4 and I5 are preferably provided with sleeves thereon constituting antifriction rollers as 22-22.

The surfaces 29 and 30 respectively cooperate With the cross pins to hold the levers L and G in proper relationship to the cross pins at all times and to prevent disconnection of the levers from each other.

The cross pins [4 and I5 may be held in place by suitable retaining nuts or the like as 26 thereby enabling removal of the cross pins and consequent disconnection of the two lever members L and G from each other when desired, as for instance for the making of repairs or for the substitution of a lever L having a difierent form of cutting blade I.

While the invention has been illustrated in what is considered its best application it may have other embodiments without departing from its spirit and is not, therefore, limited to the structure shown in the drawing.

What I claim is:

1. A metal cutting tool comprising a pair of jaws pivotally connected together and adapted for cutting the metal by pivotal movement of said jaws, the pivotal connection between said jaws including a pair of spaced pivot forming members carried by one jaw and slidably engageable by spaced parts of the other jaw, and a spring plate carried by said pivot forming members and bridging therebetween in engagement with the second jaw to hold said jaws in operative assembly.

2. A metal cutting tool comprising a pair of jaws pivotally connected together and adapted for cutting the metal by pivotal movement of said jaws, the pivotal connection between said jaws including a shoulder of one jaw disposed in engagement with the surface of the other jaw and a pair of retaining members carried by one jaw on opposite sides of the jaw and slidably engageable by spaced parts of the other jaw, and a spring plate carried by said pivot forming members and bridging therebetween extending across and in engagement with the secand jaw to hold said jaws in operative assembly.

3. A metal cutting tool comprising a pair of jaws pivotally connected together and adapted for cutting the metal by pivotal movement of said jaws, the pivotal connection between said jaws including a plurality of spaced pivot forming members carried by one jaw on opposite sides of the other jaw and engaged by spaced parts of the other jaw and a spring plate carried by said pivot forming members extending across and engaging with the second jaw to hold said jaws in operative assembly.

ARCHIBALD L. WALLACE. 

